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(11) | EP 0 538 966 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Line precharging circuits and methods |
| (57) A bus precharge circuit is provided that precharges a bus line or node as an inverse
function of the precharge level already attained on the bus line, such that the precharge
level on the bus line is gradually approached. The precharge circuit charges the bus
line to a midpoint between high and low logic states. The preexisting state of the
bus line is stored and is used to select one of two voltage supplies to which the
bus line may be partially pulled up or down. The switchpoint of a precharge circuit
sensing gate is set to be equivalent to the switchpoint of the receiving gate of receiver
on the bus line. |